Process for protecting wool, furs, and other materials against attack by moths



Patented Nov. 24," 1925.

UNITED STATES PATENT, OFFlCE.

, WILHEL'M LOMMEL, 0F WIESDOREON THE-RHINE. AND HEINRICH Mfi'NZEL, OF LEVERKUSEN-ON THE-RHINE. GERMANY, ASSIGNORS TO FARBENFABRIKEN VORM. FRIEDR. BAYER AND CO. 013 LEVERKUSEN, NEAR COLOGIifE-ON-THE-RHINE,

GERMANY.

PROCESS FOR PROTECTING WOOL, FURS, AND OTHER MATERIALS AGAINST ATTACK BY MOTHS.

Ho Drawing.-

Totall whom it may concern.

Be it known that we, WILHELM LOMMEL and HEINRICH MiiNznL, citizens of Germany, residing at Wiesdorf-on-the-Rhine and Leverkusen-on-the-Rhine, in the State Against Attack by Moths, of which the following is a specification.

The method hitherto employed for protecting wool, furs, and other materials from v the ravages of moths has been to placeamong them substances such as naphthalene, camphor or pepper, possessing a penetrating odour; these substances remain of course efiicacious only so long as their odour persists. A

The present process whereby materials liable to be attacked by moths can be permanently and completely protected. According to this invention the materials to be protected from moths are treated with chemical substances containing the following group: a

wherein R represents hydrogen or a radical, such as ethyl, methyl, phenyl, acetyl, benzoyl; X represents nitrogen or carbon and Y represents nitrogen, carbon or a nuclear radical.

In order to illustrate our invention we mention by way of examples the following pyrazolone,

invention relates to a new,

v questlon in any suitable manner, e. g.

' Application filed May 10, 1924. Serial No. 712,472.

triphenylguanidine,

l benzylidene phenylmethylhydrazone sulfonic acid,

lit l1 acetyldichlorocarbazole. In this compound the COCH group corresponds to the R,

the N corresponds to the N and one orthe other of the pairs of carbon atoms marked 1 and 2 of the two benzene rings corresponds to the X and Y of the formula The efiective group N-X=Y may be present in the substance twice or several times.

These moth repelling substances (in practice dissolved in a suitable solvent, e. g.

benzene) are applied to the material in b spraying the solution upon the wool etc. oi immersing the wool etc. into a solution. It appears that even small quantities suflice to ensure complete protection of the wool, furs or other materials.

1. The hereindescribed process for proit I wherein R represents hydrogen or a radical, X represents nitrogen or carbon and Y represents nitrogen, carbon or a nuclear 4 radical.

2. A moth-proof material of fabric consisting of a material or fabric liable to be attacked by moths, having incorporated or combined therewith a moth-repelling chemlcal substance containing the group wherein R represents hydrogen or a radical, X represents nitrogen or carbon and Y represents nitrogen, carbon or a nuclear radical.

In testimony whereof we have hereunto set our hands.

WILHELM 1 LOMMEL. HEINRICH MUNZEL. 

